OPTICAL HEAD DRIVING UNIT AND OPTICAL PICKUP DEVICE USING IT, OPTICAL DEVICE

摘要

PROBLEM TO BE SOLVED: To compose an object lens so that it can be fixedly held on a holder without using an adhesive in an optical head driving device such as an object lens driving device, etc. SOLUTION: An object lens 2 is fixedly held on a holder 3 by forming projecting parts 9, 9 at the bottom part of the outer peripheral surface of the object lens 2, mounting this object lens 2 at a predetermined position of a lens holding plane on the holder 3 with the bottom face of the object lens over the projecting parts 9, 9 abutted thereon, and elastically holding the projecting parts 9, 9 abutted on the holder 3 by a spring material 17 as a non-adhesive tightening means 16.